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July 5, 2012, 13:42 |
How to define a field on a patch
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#1 |
Member
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Greetings, dear colleagues!
I have a case with 2 meshes (say, "a" and "b"). And I need to implement a boundary condition (for the field u) like: grad (u_a) = const*(u_a - u_b) i.e. boundary gradient for the field u on the "a"-mesh side is proportional to the difference between the values of the u field on the "a"-"b" interface. Now the question: is it possible to define a field on the patch? When I do patch to patch interpolation I obtain a scalar field which groovyBC doesn't recognize (because it is not associated with specific patch). So I think I have to define a field on a specific patch. But how to do it? Or is there any other ideas how to implement desired BC? Thanks in advance. Best regards, Aleksey. |
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July 9, 2012, 12:23 |
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#2 |
Senior Member
Tomislav Maric
Join Date: Mar 2009
Location: Darmstadt, Germany
Posts: 284
Blog Entries: 5
Rep Power: 21 |
Hi Aleksey,
try this to get an access to a boundary field: Code:
fvPatchField<Type>& someFieldBuondaryField = someField.boundaryField()[patchI]; Be careful to use scalar, vector or tensor instead of Type, depending on the GeometricField<Type, ...> that you are dealing with. There are also some typedefs for the boundary patch fields like fvPatchScalarField I think.... Tomislav |
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field, interpolation, patch |
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